Hand reamlng-machine



` UNITED STATES .PATENT OFFICE,

MA'RKFLATHER, OF NASHUA, NEW HAMPSHIRE.

HAND REAIVIING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 273,976, dated March 13, 1888. Application filed November 27,1882. (No model.)

To all whom it may concern:

Be it known that I, MARK FLATHER, of Nashua, State of New Hampshire, have invented an Improved Hand Reaming-Machine', ot' which the following is a specification.

This invention relates to a machine adapted tohold pulleys and other articles while being reamed or tapped by hand, which articles cannot well be held in a vise, and in reaming which itis necessary that the workman may pass freely around the same; and the invention will, in connection with the accompanying drawings, be `hereinafter fully described, and specicallydened inthe appended claims.

Figure 1 is a perspective view of my machine complete. Fig. 2 is a top or plan view thereof, but not showing the projecting portion of the base. Fig. A3 is a vertical section taken on line Y Y, Fig. 2, through the chuck, and showing the upper portion of the supporting-standard. Fig. 4 is an inverted or un-` der side plan view of the central portion of the chuck or holding portion of my machine. Fig. 5 is a top or plan view of the head or top of the supporting-standard, and showing its indented line by which it is interlocked with the chuck.

a In these' views, A represents the standard, and B the base thereof, by which it is secured in position upon the floor. The head of the fl'standard is preferablyformed with four teeth or projections, a, as shown in detached Fig. 5, while the chuck G is formed with four similar teeth, b, which nt closely between the teeth a of standard A, whereby the teeth of the chuck and standard are interlocked in order that they may receive and resist `the circumfcren tialstrain to which the chuck is subjected when in use. Standard A is formed hollow, with an elongated openin g, h, through the shell, on opposite sides thereof', as shown, in order to facilitate the removal of the reamers Vafter they have passed down through the article in which they have been used.

Chuck U is formed in any ofthe well-known modes ofconstruction butI prefer that shown, which is the' common independent four-jawed chuck, in which c is the bed, and d d L d are the jaws, which are seated in bed o, and are actuated by screws e, which are formed with a concentric collar seated in a recess in bed o,

and held from lineal dis-placement by an int and standard are secured together by screws 7c, which are countersunk or counterbored inv bed c, and are threaded in the standard, as

Vshown by dotted lines.

The chuck proper, in so far as relates to its holding-jaws and the connection thereof with bed c, and the means ot' actuating the jaws, are old and Well known, and I make no claim thereto; nor is this pa-rticular'form of chuck or any specific kind essential to my invention.

For many jobs ot hand-reaming, and espe.

cially for reaming the larger sizes of pulleys, it `is exceedingly inconvenient and difficult to hold the same in a vise, so much so that chucks have in some instances been fastened upon a bench for the purpose; but they Vare entirely unsatisfactory', especially when reaming articles which require the services of two men-one at each end of the reamer, wrench, or lever--when it is necessary for the workmen to move in circles around the pulley, and hence I have invented my machine, which consists in a chuck secured in horizontal position upon a pillar or supporting frame, which is self-contained and adapted to be secured to the floor in any desired position to allow free passage to the workman on all sides of and around the same, and with an axial passage through the bed ofthe chuck and pillar for the the reamer, and an opening in the side ot' the pillar for the removal ofthe same after it has performed its work. y

lExcept for convenience of construction and repairs and reduction of cost ot' the machine, the standard A and bed c of the chuck could be formed as au entire casting; but the formt ing them separately, and unitingthem in the manner shown and described, possesses de- 3. The chuck C and standard A, jointly 1o cided advantages over the method of forming formed respectively with teeth a and b, ar-

them as an entirety. ranged to interlock and resist: the torsional strain applied to the chuck when infuse, sub- I claim as my invention- I 5 1. The chuck C, jointly with the standard stantially as specied.

i MARK FLATHER.

A, the one mounted upon the other, substantially as shown and described. Witnesses:

2. The improved standard A, having the GEORGE E. GAGE,

slot or opening h, substantially as deseribed. v H. O. GREENWOOD. 

